LONDON, Ont. - Provincial police are investigating a single-vehicle crash that claimed three lives early Friday morning in Oil Springs, Ont.

The crash occurred around 1:30 a.m. Friday on Oil Heritage Road just south of Petrolia.

OPP say the car left the pavement at a point where the road curves and rolled a number of times.

Three passengers, all in their early 20s, were killed. The driver was taken to hospital as a precaution but was reportedly not seriously injured.

Police say the three victims are not from the area.

UPDATE: ROAD CLOSURE: Oil Heritage Rd between Aberfeldy Li and Gum Bed Li #OilSprings - 3 fatalities, expect extended closure. ^kw

— OPP West (@OPP_WR) October 4, 2019

Oil Heritage Road was closed between Aberfeldy Line and Gum Bed Line for about 12 hours as the Traffic Reconstruction Team investigated.

- With files from CTV London's Gerry Dewan